condition mean min max ZT0-3 67.70785000000001 64.8451 70.5706 ZT4-7 89.05305 89.05305 89.05305 ZT8-11 73.1109 73.1109 73.1109 ZT12-15 0 0 0 ZT16-19 97.2699 97.2699 97.2699 ZT20-23 91.4599 91.4599 91.4599